using ulp to improve TranslateManager GetTargetLanguage() and InitiateTranslation()

components/translate/core/browser/translate_prefs.h

Index: components/translate/core/browser/translate_prefs.h
diff --git a/components/translate/core/browser/translate_prefs.h b/components/translate/core/browser/translate_prefs.h
index d03e2590061debcd9317873d50af269330d1de37..afcb8df9fbe3576996f5fd0c8cfa5a9da64cdf49 100644
--- a/components/translate/core/browser/translate_prefs.h
+++ b/components/translate/core/browser/translate_prefs.h
@@ -78,6 +78,7 @@ class DenialTimeUpdate {
 // It is assumed that |prefs_| is alive while this instance is alive.
 class TranslatePrefs {
  public:
+  static const char kPrefLanguageProfile[];
   static const char kPrefTranslateSiteBlacklist[];
   static const char kPrefTranslateWhitelists[];
   static const char kPrefTranslateDeniedCount[];
@@ -165,6 +166,27 @@ class TranslatePrefs {
   bool ShouldAutoTranslate(const std::string& original_language,
                            std::string* target_language);
 
+  // Language and probability pair.
+  typedef std::pair<std::string, double> LanguageProbability;

[groby-ooo-7-16, 2016/08/02 00:38:21]

LanguageAndProbability, please (so it's obvious this is a pair)

[ftang, 2016/08/03 02:01:18]

Done.

+  typedef std::vector<LanguageProbability> LanguageProbabilityList;
+
+  // Output the User Profile Profile's (ULP) "reading" list into |list| as
+  // order list of <string, double> pair. Return the confidence of the list
+  // or 0.0 if there no ULP "reading" list.
+  virtual double GetReadingFromUserLanguageProfile(
+      LanguageProbabilityList* list) const;
+
+  // Output the User Profile Profile's (ULP) "writing" list into |list| as
+  // order list of <string, double> pair. Return the confidence of the list
+  // or 0.0 if there no ULP "writing" list.
+  virtual double GetWritingFromUserLanguageProfile(
+      LanguageProbabilityList* list) const;
+
+  // Output the order list of Universal Language Settings (ULS) to |list|

[groby-ooo-7-16, 2016/08/02 00:38:21]

What is the order list?

[ftang, 2016/08/03 02:01:18]

function removed. 

+  // and return the number of item on the list or 0 if there are no ULS list.

[groby-ooo-7-16, 2016/08/02 00:38:21]

The number of items should be available via |list->size()|, correct? So we
probably don't need to return that.

[ftang, 2016/08/03 02:01:18]

function removed. 

+  virtual int GetUniversialLanguageSettings(
+      std::vector<std::string>* list) const;
+
   static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
   static void MigrateUserPrefs(PrefService* user_prefs,
                                const char* accept_languages_pref);
@@ -189,6 +211,9 @@ class TranslatePrefs {
   bool IsListEmpty(const char* pref_id) const;
   bool IsDictionaryEmpty(const char* pref_id) const;
 
+  double GetFromUserLanguageProfile(base::StringPiece path,
+                                    LanguageProbabilityList* list) const;
+
   // Path to the preference storing the accept languages.
   const std::string accept_languages_pref_;
 #if defined(OS_CHROMEOS)